protected override Expression VisitForeignKeyConstraint(SqlForeignKeyConstraintExpression foreignKeyConstraintExpression)
{
var action = new SqlConstraintActionExpression(SqlConstraintActionType.Add, foreignKeyConstraintExpression);
var ammendmentEpression = new SqlAlterTableExpression(currentTable.Table, action);
ammendments.Add(ammendmentEpression);
return null;
}
protected virtual Expression VisitAlterTable(SqlAlterTableExpression alterTableExpression)
{
var newTable = this.Visit(alterTableExpression.Table);
var newList = this.VisitExpressionList(alterTableExpression.Actions);
if (newTable != alterTableExpression.Table || newList != alterTableExpression.Actions)
{
return(new SqlAlterTableExpression(newTable, newList));
}
return(alterTableExpression);
}
protected override Expression VisitAlterTable(SqlAlterTableExpression expression)
{
SqlAlterTableExpression current;
if (!TryGetCurrent(expression, out current))
{
return expression;
}
if (!(this.result &= current.NodeType == expression.NodeType))
{
return expression;
}
if (!(this.result &= current.Type == expression.Type))
{
return expression;
}
this.currentObject = current.Table;
this.Visit(expression.Table);
if (!this.result)
{
return expression;
}
this.currentObject = current.Actions;
this.VisitExpressionList(expression.Actions);
if (!this.result)
{
return expression;
}
this.currentObject = current.ConstraintActions;
this.VisitExpressionList(expression.ConstraintActions);
if (!this.result)
{
return expression;
}
this.currentObject = current;
return expression;
}
protected override Expression VisitAlterTable(SqlAlterTableExpression alterTableExpression)
{
this.Write("ALTER TABLE ");
this.Visit(alterTableExpression.Table);
this.Write(" ");
this.VisitExpressionList(alterTableExpression.Actions);
this.WriteLine(";");
return alterTableExpression;
}
protected virtual Expression VisitAlterTable(SqlAlterTableExpression alterTableExpression)
{
var newTable = this.Visit(alterTableExpression.Table);
var newList = this.VisitExpressionList(alterTableExpression.Actions);
if (newTable != alterTableExpression.Table || newList != alterTableExpression.Actions)
{
return new SqlAlterTableExpression(newTable, newList);
}
return alterTableExpression;
}
protected override Expression VisitAlterTable(SqlAlterTableExpression alterTableExpression)
{
this.Write("ALTER TABLE ");
this.Visit(alterTableExpression.Table);
this.Write(" ");
if (alterTableExpression.ConstraintActions != null)
{
this.VisitExpressionList(alterTableExpression.ConstraintActions);
}
else if (alterTableExpression.Actions != null)
{
foreach (var action in alterTableExpression.Actions)
{
this.Visit(action);
}
}
this.WriteLine(";");
return alterTableExpression;
}